we have a web server inside our LAN.
We have PIX32 between the world and us.
I know that traffic can not come from one interface and flow to the same interface (in this case the inside one)
This mean that internal clients can not access web server (e.g. www.pincopallo.it) because the DNS response return an
external IP but the real machine (192.168.31.26) is inside the lan.
We have just insert the static and conduit statement for internet people to access our web server.
static (inside,outside) IP_of_www.pincopallo.it 192.168.31.26 netmask 255.255.255.255 0 0
conduit permit tcp host ...DNS doctoring, alias .
Does the DNS doctoring work without specifing protocols and ports or does it with them as well?
Are internal DNSes needed for the doctoring to work properly or is it the same thing to have clients with external DNSes
specified and answers from them are anyway translated?
"AM" <firstname.lastname@example.org> wrote in message
> Does the DNS doctoring work without specifing protocols and ports or does
it with them as well?
yes, you can use the alias command completly "stand-alone"
look at the Cisco doc for "understanding th...DNS Doctoring conversion?
Currently, we are using the ALIAS command for DNS doctoring to access
private IP resources inside the network that are also accessed from
outside the network:
alias (inside) 10.y.y.249 209.x.x.35 255.255.255.255
I know that Cisco has said that they are only maintaining this command
for backward compatability and recommend going to the STATIC entry.
But, I am confused by this entry on how to properly implement. Any
insight would help on the proper structure to continue being able to
provide DNS doctoring access from the inside of the network.
I am running a PIX 515 6.3(3)
On Mon, 10 Nov 2...DNS doctoring 300001
I have problem with DNS doctoring in PIX 6.3(3)
I set alias command and sysopt noproxyarp inside
and it doesn't work.
Out customer has linux with masquarade and he has static and
for outside DNS they see this domain as static IP
and they can't achieve this server. Then I try set alias command.
Any known bug or sth else ?
...DNS Doctoring with PIX
I have upgraded to PIX 6.3(4) and I am trying to use the DNS command in my
STATIC to access my inside server via domain name. I do not use an internal
My question is, am I missing some other command, sysopt or fixup to make
this work? The static I have does work for outside-inside traffic, but
still does not 'doctor' the DNS inquiries for inside use. I do have the
fixup protocol dns maximum-length 512 statement. There really isn't a lot
of info on using this command in a static. I know there is an alias
command, but I only have one IP address that I need to...DNS Doctoring with a cisco router
I'm wondering if there's a command that is similar to the PIX
firewall's ALIAS command on a Cisco Router. Can anyone help me here?
On Tue, 25 Nov 2003 16:32:22 -0600, Cool Guy Bri wrote:
> I'm wondering if there's a command that is similar to the PIX firewall's
> ALIAS command on a Cisco Router. Can anyone help me here?
According to Document 26704, NAT Frequently Asked Question, it does DNS
doctoring by default.
Thank You for your help Rik!
Rik Bain <email@example.com...PIX DNS doctoring with 2003 server
A quick question guys.
I recently put a few firewalls in a customer premises with a static NAT
policy. Internally the clients were 192.168.1.x but extrenally they were
135.1.1.x statically mapped one for one. DNS always worked ok since there
were no servers on these sites - I accepted the limitaion that the machines
cannot ping by machine name. This worked loads of times. I then had
another site exactly like this but had a server as well as just client PC's.
The clients could not get their drive mappings on this server until I
clicked the DNS option against the static transatio...Dns doctoring/dnsmasq -V on bind?
After googeling a lot I kinda gave up and ended here.
Im running a bind server, where we have out .loc zone on and also use it for
We have our domains hosted @ our ISP's DNS-Servers.
Now recently management decided to migrate from cisco to
Now as you might know, there is a dns-doctoring feature on cisco devices,
that will rewrite ip addresses in dns-query-responses.
I found a nice non-cisco explanation by someone who had my problem some
> My dns server sits outside my firewall on the internet and answers queries
for bo...DNS Reply Modification (doctoring) intermittently failing
We have the following configuration that requires DNS reply
1) Cisco FWSM at version 18.104.22.168
2) Firewall directly connected to our ISP.
3) A DMZ (webDMZ) containing the web servers to be doctored
4) Hosts and internal DNS server on the Inside
5) ISP dns server
The internal clients (4) resolve the web server addresses (3) through
the internal DNS server (4) which pulls the DNS data from the external
DNS server (5).
The FWSM (1) is configured to do the DNS reply modification to provide
the internal clients (4) with the private webDMZ address.
Outside clients obtain the public NA...